ID needed?

Will I need some sort of i.d. for proof of age for my son when we do tours, rent stuff, activities, etc? He's 11, nearly 12, and tall. I see the cut off for a break in prices is at 12.. will I be questioned about his age?

Will I need some sort of i.d. for proof of age for my son when we do tours, rent stuff, activities, etc? He's 11, nearly 12, and tall. I see the cut off for a break in prices is at 12.. will I be questioned about his age?

My daughters (now 16 and 18) never had a problem being questioned about age.